CN106457911B - Tire with improved dynamic property - Google Patents
Tire with improved dynamic property Download PDFInfo
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- CN106457911B CN106457911B CN201580034650.0A CN201580034650A CN106457911B CN 106457911 B CN106457911 B CN 106457911B CN 201580034650 A CN201580034650 A CN 201580034650A CN 106457911 B CN106457911 B CN 106457911B
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- layer
- reinforcing element
- equal
- tire
- crown
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/1835—Rubber strips or cushions at the belt edges
- B60C9/185—Rubber strips or cushions at the belt edges between adjacent or radially below the belt plies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/1835—Rubber strips or cushions at the belt edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C9/2003—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel characterised by the materials of the belt cords
- B60C9/2006—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel characterised by the materials of the belt cords consisting of steel cord plies only
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/02—Ingredients treated with inorganic substances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C2001/0066—Compositions of the belt layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C2001/0075—Compositions of belt cushioning layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C2009/1878—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers with flat cushions or shear layers between the carcass and the belt
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C2009/2061—Physical properties or dimensions of the belt coating rubber
- B60C2009/2064—Modulus; Hardness; Loss modulus or "tangens delta"
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/006—Additives being defined by their surface area
Abstract
The present invention relates to a kind of tire, it includes crown reinforcement, and the crown reinforcement is formed by least two work crown layers of reinforcing element, and the work crown layer intersects from one layer to next layer, while is formed in the angle between 10 ° and 45 ° with circumferential direction.According to the present invention, the first layer S of polymeric blends is contacted with least one work crown layer, and contacted with carcass reinforcement, the first layer S of the polymeric blends is axially extending until at least the axial end portion of tyre surface, the plural dynamic shear modulus G* that the first layer S of the polymeric blends is measured at 10% and 60 DEG C in circulation is returned are more than 1.35MPa.
Description
Technical field
The present invention relates to the tire with radial carcass reinforcement, relates more specifically to be intended to be assemblied in carrying heavy load
And with the tire on the vehicle (such as lorry, tractor, trailer or motor bus) of continuous speed traveling.
Background technology
In the tire of heavy type, carcass reinforcement is generally anchored to the both sides in bead area, and by by least
The crown reinforcement that two layers are formed radially covers, this at least two layers are overlapped, and by parallel in each layer and from one layer
Intersect to form to next layer and formed with the silk thread or cord of circumferential direction into the angle between 10 ° and 45 °.Form work reinforcement
The working lining can further be covered by least one so-called protective layer, which be formed by reinforcing element, the increasing
Element is advantageously metal and extendible by force, therefore referred to as elastic reinforcing element.It can also include having and circumferential direction
Direction shape it is at 45 ° and 90 ° between angle the tinsel of low extensibility and the layer of cord, which is referred to as triangle curtain
Layer of cloth, it is located radially between carcass reinforcement and the first crown plies, and the first crown plies are referred to as work cord
Layer, it is formed by the parallel silk threads or cord being laid with angle of the absolute value no more than 45 °.Triangle casing ply and at least described work
Make casing ply and form triangle reinforcement, which has low deformation, triangle casing ply under its various stress being subjected to
It is essentially available for absorbing the lateral compressive force being applied in all reinforcing elements in tyre crown region.
When cord shown under the drawing force equal to ultimate strength 10% at most be equal to 0.2% when specific elongation when,
The cord is known as inextensible.
When cord shows specific elongation at least equal to 3% under the action of the drawing force equal to fracture load and is less than
During the maximum tangent modulus of 150GPa, the cord is known as elastic.
Circumferential reinforcing element is to be formed between+2.5 ° and -2.5 ° the angle for being about 0 ° with circumferential direction
Reinforcing element.
The side that the circumferential direction or longitudinal direction of tire correspond to the periphery of tire and limited by tire running direction
To.
Rotation axis of the horizontal direction or axial direction of tire parallel to tire.
Radial direction is and the jante et perpendiculaire of tire and perpendicular direction.
The rotation axis of tire is the axis that tire is rotated about in normal use.
Sagittal plane or meridional plane are the planes of the rotation axis comprising tire.
Plane or equatorial plane are perpendicular to the rotation axis of tire and by the plane of tire dimidiation in circumferential direction.
" elasticity modulus " of rubber compounding thing is understood to mean that the secant extension in 10% deformation at ambient temperature
Modulus.
As for rubber composition, the measurement of modulus according to the standard AFNOR-NFT-46002 of in September, 1988 under tension into
OK：Measured in being extended at second (i.e. after one adapts to circulate) (according to the standard AFNOR-NFT- in December, 1979
40101 normal temperature and relative humidities) nominal secant modulus (or apparent stress, with MPa tables under 10% elongation
Show).
Due to the improvement of whole world highway network and the growth of highway network, it is referred to as some existing of " highway " tire
There is tire to be intended to run at high speed in increasingly length during the journey.The combination condition of this tire running causes to go without doubt
The distance sailed increases, and the abrasion on tire is reduced；On the other hand, the durability of the durability of tire, particularly crown reinforcement
It is adversely affected.
This is because there are stress in crown reinforcement, the shear stress being particularly between crown layer, plus axial direction most
The rise that can not ignore of the running temperature of the end of short crown layer, its effect be cause crack occur in rubber and
The end diffusion.
In order to improve the durability of the crown reinforcement of the tire of studied type, it has been suggested that with being arranged on casing ply end
Between portion (end of more particularly axial most short casing ply) and/or the layer of the rubber compounding thing of surrounding and/or forming element
Structure and the relevant solution of quality.
Especially it is known practice be between the end of working lining introduce rubber compounding thing layer so as to the end it
Between produce and disengage, so as to limit shear stress.But this layer disengaged must have fabulous cohesive force.It is this
The layer of rubber compounding thing is for example described in patent application WO 2004/076204.
In order to improve the resist degradation ability for the rubber compounding thing for being located at crown reinforcement adjacent edges, patent FR 1 389
428 suggest combining low hysteresis tyre surface using the covering at least side of crown reinforcement and edge and are matched somebody with somebody by low hysteresis rubber
The rubber molding element that mixed thing is formed.
In order to avoid the separation between crown reinforcement casing ply, patent FR 2 222 232 is taught the end of reinforcement
Portion is coated in rubber pad, and the Xiao A hardness of tyre surface of the Xiao A hardness of the rubber pad from surrounding the reinforcement is different,
And Xiao of the forming element higher than the rubber compounding thing between crown reinforcement and the edge of carcass reinforcement casing ply
Family name's A hardness.
The tire prepared in this way effectively allow particularly durability really in terms of performance improvement.
In addition, in order to prepare tire with extremely wide tyre surface or the negative of bigger be assigned on the tire with certain size
Lotus ability to bear, it is known that practice be to introduce the layer of circumferential reinforcing element.Such as patent application WO 99/24269 describes presence
The layer of this circumferential direction reinforcing element.
The layer of circumferential reinforcing element is usually formed by an at least metal cords, and the metal cords winding is so as to form phase
It is less than 2.5 ° of coil for the ply stacking angle of circumferential direction.
During experiment, present inventors have shown that, when the tire of some kind of design of the layer including circumferential reinforcing element
Such as when being subject to serious and frequent load in a manner of being likely encountered when driving along winding road, the side of the tire presentation
Property in terms of inclined rigidity, which may to be made in the rubber compounding thing for the crown reinforcement being arranged between working lining, to be opened
Split.The cracking damages the durability properties of tire certainly.When overloading and running at high speed on winding road, it is described crack into
One step aggravates.
The content of the invention
The object of the present invention is to provide a kind of tire, the dynamic property (particularly cornering stiffness) of the tire is changed
Into, therefore durability properties are maintained regardless of whether the degree of wear how, is particularly causing the traveling bar of serious lateral deviation stress
Under part.
The purpose is achieved in that by the present invention：Using a kind of tire, it is with radial carcass reinforcement, the radial direction tire
Body reinforcement includes crown reinforcement, and the crown reinforcement is formed by the work crown layer of at least two reinforcing elements, work
Crown layer intersects from one layer to another layer forms the angle being included between 10 ° and 45 °, polymer blend with circumferential direction
First layer S contacted with least one work crown layer, and contacted with carcass reinforcement, the first layer of the polymer blend
The axial end portion until at least tyre surface is axially extended, the tyre surface radially covers crown reinforcement, and passes through two sidewalls
Be connected to tyre bead, the first layer S of the polymer blend at 10% and 60 DEG C return circulate in the plural number dynamic that measures
Modulus of shearing is more than 1.35MPa.
Plural dynamic shear modulus (G*) is the dynamic property of the layer of rubber compounding thing.It is in viscosity analyser
Measured on (Metravib VA4000) according to standard ASTM D 5992-96.Recording the sample of vulcanising composition, (thickness is
4mm, cross section 400mm2Cylindric sample) be subjected to simply replacing shear stress at a temperature of the frequency of 10Hz and 60 DEG C
Sinusoidal load under response.From 0.1% to 50% (to outer circulation), then strained from 50% to 1% (returning to circulation)
Amplitude scans.
A preferred embodiment according to the present invention, the crown reinforcement of tire include at least one circumferential enhancing member
The layer of part.
The present inventor is able to verify that, selects the complex shear modulus G* measured at 10% and 60 DEG C in circulation is returned big
The dynamic property and particularly cornering stiffness property of tire are improved in the first layer S of 1.35Mpa, especially in lateral deviation cracking side
Under the particularly disadvantageous driving conditions in face.
Especially and those skilled in the art completely unexpectedly, first layer S (the layer S of polymer blend
Be configured to contact with the layer of carcass reinforcement and at least one crown reinforcement) property significantly affect cornering stiffness property.
The present inventor further confirms to select the first layer S of the polymer blend not damage the stress that tire is subjected in straight-line travelling
The performance of aspect.
The present inventor can also confirm, despite the presence of layer (the layer imparting tire particularly tire of circumferential reinforcing element
The significant rigidity of crown reinforcement), be remarkably contributing to the cornering stiffness property above for the first layer S features enumerated.
Due to assigning tire stiffness, the presence of the layer of circumferential reinforcing element seems to fully and optimal in theory
Ground influences cornering stiffness property.The experiment of progress confirm the property of first layer S significantly affect the cornering stiffness property of tire and
Also allow to improve cornering stiffness property even if when there is the layer of circumferential reinforcing element.
Advantageously, according to the present invention, the complex shear mould measured at 10% and 60 DEG C in circulation is returned of first layer S
Amount G* is less than 2MPa, if therefore the durability properties and its rolling resistance property of tire be damaged, the thermal property of tire
Will not excessively it change.
Additionally advantageously, the use tan (δ) of first layer SmaxMaximum tan (δ) value of expression is less than 0.100.
A preferred embodiment according to the present invention, the first layer S of polymer blend are included by forming as follows
Reinforcer：
A) BET specific surface area is in 30 and 160m2Carbon black between/g, equal to or more than 15phr and to be less than or equal to
The content of 28phr uses,
B) or specific surface area is in 30 and 260m2The silica for including SiOH and/or AlOH surface functional groups between/g
And/or the white filler of alumina type, the white filler are selected from precipitation or pyrolytic silicon dioxide, aluminium oxide, aluminosilicate, or
In building-up process or the post-modification of synthesis carbon black, to make more than or equal to 15phr and less than or equal to the content of 55phr
With,
C) carbon black described in or a) and b) described in white filler blend, wherein overall filler content is greater than or equal to
15phr and it is less than or equal to 50phr, and the phr contents of white filler are greater than or equal to the phr contents that carbon black subtracts 5.
The present inventor further confirms that first layer S has enough cohesive force so as to limit when object pierces through tire tread
The sprawling in the crack of appearance.Present inventors also established that being pierced through even in object under the above situation of tire tread, group can be also realized
Close the compromise of the tyre performance of dynamic property (particularly cornering stiffness, rolling resistance and durability properties).
In the implication of the present invention, cohesion rubber compounding thing is the rubber compounding thing of special anti-cracking.Therefore by
The cohesive force of the fatigue cracking test assessment blend carried out on " PS " (pure shear) sample.It is described experiment be included in sample into
Determine crack rate of propagation " PR " (French is abbreviated as " VP ") (nm/ cycles) with energy rate of release " E " (J/ after row indentation
m2) change.The scope of experiment for measuring covering is the gas of the temperature between -20 DEG C and+150 DEG C, air or nitrogen
Atmosphere.The stress of sample is the amplitude applied in the form of pulse stress loads (" haversine " tangent line signal) in 0.1mm and 10mm
Between dynamic mobile, remaining time is equal to the pulse duration；The frequency averaging of signal is about 10Hz.
Measurement includes 3 parts：
The adaptation in 1000 cycle of " PS " sample under 27% deformation.
Energy characterization is so that it is determined that " E "=f (deformation) law.Energy rate of release " E " is equal to W0*h0, wherein W0=
Each cycle and per unit volume are supplied to the energy of material, the elemental height of h0=samples.Utilize " power/displacement " gathered data
Therefore the relation between " E " and the amplitude of stress load is provided.
" PS " sample is being carried out to measure crack after indentation.The data of collection are to definite crack rate of propagation " PR "
With the change of the stress level " E " of application.
A favourable alternative form according to the present invention, tire include the second layer G of polymer blend, and described second
Between the radially innermost layer of the layer G reinforcing elements that are radially positioned at carcass reinforcement and crown reinforcement and axial width at least
Equal to the 70% of the width of the radially innermost layer of the reinforcing element of crown reinforcement, and circulation is being returned at 10% and 60 DEG C
In the complex shear modulus G* that measures be more than 1.35MPa.
The preferred embodiment of the alternative form according to the present invention, the axial width of the second layer G are at most equal to tire
It is preced with the width of the radially innermost layer of the reinforcing element of reinforcement, and the preferably at least equal to footpath of the reinforcing element of crown reinforcement
To the 90% of the width of innermost layer.
The alternative form according to the present invention is it is further preferred that the thickness measured in radial directions of the second layer G is big
In φ and preferably smaller than 3 φ, φ be crown reinforcement radially innermost layer reinforcing element diameter.
The present inventor can also confirm that the second layer G of the polymer blend thus limited is compounded by supplementing polymer
The first layer S of thing and the layer (if present) of possible circumferential reinforcing element are so as to further help in the side for improving tire
Inclined stiffness properties.
Advantageously, according to the present invention, the complex shear mould measured at 10% and 60 DEG C in circulation is returned of second layer G
Amount G* is less than 2MPa, if therefore the durability properties and its rolling resistance property of tire be damaged, the thermal property of tire
Will not excessively it change.
Additionally advantageously, the use tan (δ) of second layer GmaxMaximum tan (δ) value of expression is less than 0.100.
One preferred embodiment of the alternative form according to the present invention, the second layer G of polymer blend are included
By the reinforcer formed as follows：
A) BET specific surface area is in 30 and 160m2Carbon black between/g, equal to or more than 15phr and to be less than or equal to
The content of 28phr uses,
B) or specific surface area is in 30 and 260m2The silica for including SiOH and/or AlOH surface functional groups between/g
And/or the white filler of alumina type, the white filler are selected from precipitation or pyrolytic silicon dioxide, aluminium oxide, aluminosilicate, or
In building-up process or the post-modification of synthesis carbon black, to make more than or equal to 15phr and less than or equal to the content of 55phr
With,
C) carbon black described in or a) and b) described in white filler blend, wherein overall filler content is greater than or equal to
15phr and it is less than or equal to 50phr, and the phr contents of white filler are greater than or equal to the phr contents that carbon black subtracts 5.
Advantageously, the polymer blend that second layer G is made is identical with the polymer blend that second layer S is made.
A favourable embodiment according to the present invention, axial most wide work crown layer are radially positioned another
The inside of work crown layer.
A favourable alternative form according to the present invention, the axial width of the layer of circumferential reinforcing element are more than 0.5xW.
W be when tire be installed on its using on wheel rim and be inflated to its suggest pressure when the tire maximum axial it is wide
Degree.
The axial width of the layer of reinforcing element measures on the cross section of tire, therefore tire is in unaerated shape
State.
Preferred embodiment according to the present invention, at least two work crown layers have different axial widths, axially most
Difference between the axial width of the axial width of wide work crown layer and axial most narrow work crown layer is 10 to 30mm
Between.
A preferred embodiment according to the present invention, the layer of circumferential reinforcing element are diametrically arranged on two work
Between crown layer.
The embodiment according to the present invention, the similar layer institute compared to the outside for being radially positioned working lining can be real
Existing effect, the layer of circumferential reinforcing element can significantly more limit degree of the reinforcing element of carcass reinforcement in compression.
It is preferably diametrically separated by least one working lining with carcass reinforcement, so as to limit the stress in the reinforcing element
Load and avoid reinforcing element fatigue.
According to the present invention additionally advantageously, the diametrically work crown layer neighbouring with the layer of circumferential reinforcing element is axial wide
Degree is more than the axial width of the layer of the circumferential reinforcing element, and preferably, the either side of plane strengthens with circumferential under the line
In the direct axial continuation of the layer of element, the neighbouring work crown layer is in axial width with the layer of circumferential reinforcing element
Upper connection, departs from connection by the layer of the rubber compounding thing at least on the public remaining width of described two working linings afterwards
Connect.
There is such connection between the work crown layer adjacent to the layer of circumference reinforcing element, can reduce and act on being somebody's turn to do
The tensile stress being coupled in the axially outermost circumferential element at immediate position.
A favourable embodiment according to the present invention, the reinforcing element of the layer of at least one circumferential direction reinforcing element is gold
Belong to reinforcing element, the metal reinforcement element with the secant modulus between 10 and 120GPa and is less than under 0.7% elongation
The maximum tangent modulus of 150GPa.
According to a preferred embodiment, secant modulus of the reinforcing element under 0.7% elongation be less than 100GPa and
More than 20GPa, preferably between 30 and 90GPa, even more preferably less than 80GPa.
It is also preferable that the maximum tangent modulus of reinforcing element is less than 130GPa, even more preferably less than 120GPa.
Modulus value recited above can measure on the curve that tensile stress changes with elongation, and the elongation is logical
The preload of the 20MPa crossed on the cross section for the metal for being distributed in reinforcing element is come definite, and tensile stress, which corresponds to, to be measured
The cross-sectional area of tension force divided by the metal of reinforcing element.
The modulus value of identical reinforcing element can measure on the curve that tensile stress changes with elongation, described to stretch
Length is that tensile stress, which corresponds to, to be surveyed by the preload for the 10MPa being distributed on total cross section of reinforcing element come definite
The tension force divided by the total cross-sectional area of reinforcing element obtained.The total cross-section of reinforcing element is the compound member made of metal and rubber
The cross section of part, rubber especially penetrate into reinforcing element during the tire curing stage.
According to outside with the relevant conception of the total cross-section of reinforcing element, the axis of the layer of at least one circumferential direction reinforcing element
The reinforcing element at portion and middle part is metal reinforcement element, and the metal reinforcement element has in 5 and 60GPa under 0.7% elongation
Between secant modulus and maximum tangent modulus less than 75GPa.
According to a preferred embodiment, secant modulus of the reinforcing element under 0.7% elongation is less than 50GPa and big
In 10GPa, preferably between 15 and 45GPa, even more preferably less than 40GPa.
It is also preferable that the maximum tangent modulus of reinforcing element is less than 65GPa, even more preferably less than 60GPa.
According to a preferred embodiment, the reinforcing element of the layer of at least one circumferential direction reinforcing element is metal enhancing member
Part, the metal reinforcement element have as specific elongation function tensile stress curve, the tensile stress curve for
Less elongation has substantial constant and steeper slope with relatively slow slope for larger elongation.Additional curtain
This reinforcing element of layer of cloth is commonly known as " bimodular " element.
A preferred embodiment according to the present invention, substantial constant and steeper slope are from 0.1% and 0.5%
Between specific elongation start to occur.
Each feature of above-mentioned reinforcing element measures in the reinforcing element for be derived from tire.
According to the present invention, the reinforcing element for being more specifically suited for preparing the layer of at least one circumferential reinforcing element is such as formula
21.23 component, the structure of the formula 21.23 is 3x (0.26+6x0.23) 4.4/6.6SS；It is this into stock cord by 21
Basic silk thread composition, the formula of the basic silk thread is 3x (1+6), and three personal shares are intertwined, per one by 7 silk groups
Into the diameter for forming a silk thread of central core is equal to 26/100mm, and the diameter of 6 winding silk threads is equal to 23/100mm.This
Kind cord has the secant modulus for being equal to 45GPa and the maximum tangent modulus equal to 98GPa at 0.7% time, these modulus are being drawn
Stretch and measured on the curve that stress changes with elongation, the elongation is by being distributed on the cross section of the metal of reinforcing element
The preload of 20MPa come definite, tensile stress corresponds to the cross section of the tension force that measures divided by the metal of reinforcing element.
On the curve that tensile stress changes with elongation, the elongation is by being distributed on total cross section of reinforcing element
The preload of 10MPa is come definite, and tensile stress corresponds to the total cross-section of the tension force that measures divided by reinforcing element, and formula is
21.23 cord has 0.7% secant modulus equal to 23GPa and the maximum tangent modulus equal to 49GPa.
Similarly, another example of reinforcing element is the component of formula 21.28, the structure of the component of the formula 21.28
Make as 3x (0.32+6x0.28) 6.2/9.3SS.The cord is with 0.7% secant modulus equal to 56GPa and equal to 102GPa's
Maximum tangent modulus, these modulus measure on the curve that tensile stress changes with elongation, and the elongation is to pass through distribution
The preload of 20MPa on the cross section of the metal of reinforcing element is come definite, and tensile stress corresponds to the tension force that measures and removes
With the cross section of the metal of reinforcing element.On the curve that tensile stress changes with elongation, the elongation is to pass through distribution
The preload of 10MPa on total cross section of reinforcing element come it is definite, tensile stress correspond to the tension force that measures divided by
The total cross-section of reinforcing element, the cord that formula is 21.28 is with 0.7% secant modulus equal to 27GPa and equal to 49GPa
Maximum tangent modulus.
In the layer of at least one circumferential reinforcing element the satisfactory of sustaining layer is particular enable to using this reinforcing element
Rigidity, after the shaping and cure stage in common manufacturing method.
According to the second embodiment of the present invention, circumferential reinforcing element can be formed by inextensible hardware,
The hardware cuts so as to which girth of the formation length much smaller than most short layer is it is preferred that be more than the girth in a certain way
0.1 times of part, the notch between the part is axially offset from one another.Again less preferably, the per unit width of extra play
Elastic tensile modulus be less than the elastic tensile modulus that measures under the same conditions of work crown layer of most extensibility.The reality
The scheme of applying can assign the certain modulus of layer of circumferential reinforcing element in a straightforward manner, and the modulus can be (logical with simple adjustment
Selection is crossed with the interval between the part of a line) but be below made of in all cases identical but continuous hardware
Layer modulus, the modulus of extra play measures on the sulfuric horizon of cutting element for being derived from tire.
According to the third embodiment the present invention, circumferential reinforcing element is the ratio of corrugated metal element, wave amplitude and wavelength
Example a/ λ are at most equal to 0.09.Preferably, the elastic tensile modulus of the per unit width of extra play is less than the work of most extensibility
The elastic tensile modulus that crown layer measures under the same conditions.
Hardware is preferably steel cord.
A preferred embodiment according to the present invention, the reinforcing element for the crown layer that works is inextensible metal curtain
Line.
In order to reduce the tensile stress acted in axially outermost circumferential element, the present invention additionally advantageously makes work crown layer
The angle that is formed of reinforcing element and circumferential direction be less than 30 °, preferably smaller than 25 °.
Another favourable alternative form according to the present invention, work crown layer are included from a casing ply to another curtain
Layer of cloth intersects and the reinforcing element of angle is formed with circumferential direction, and the angle can in the axial direction change, strengthen
The angle on the axial outer edge of the layer of element is more than the angle of the element measured in circumferential direction at plane.The present invention
The embodiment can improve circumferential rigidity in some regions, while on the other hand reduce in other regions it is circumferential just
Degree, so as to significantly reduce the degree that crown reinforcement is in compression.
The preferred embodiment of the present invention also makes crown reinforcement by being referred to as the enhancing of elastic reinforcing element
At least one extra play for being referred to as protective layer of element is diametrically supplemented on the outside, and the elastic reinforcing element is with phase
Orient for angle of the circumferential direction between 10 ° and 45 °, and formed with the non-extensible element of working lining adjacent thereto
Angle there is identical direction.
Protective layer can have the axial width of the axial width smaller than most narrow working lining.The protective layer can also have
There is the axial width of the axial width bigger than most narrow working lining so that the protective layer covers the edge of most narrow working lining, and
And when protective layer be located at most streak radially above when, its in the axial continuation of additional reinforcement on axial width with
The connection of most wide work crown layer, thus afterwards the axially external forming element by thickness at least equal to 2mm with it is described most wide
Working lining disengages.In these cases, the protective layer formed by elastic reinforcing element is on the one hand optionally by shaping member
The edge of part and the most narrow working lining disengages, and the thickness of the forming element is substantially less than two working linings of separation
The thickness of the forming element at edge, on the other hand the axial width of the protective layer is axial wide less than or greater than most wide crown layer
Degree.
Any of the above-described a embodiment according to the present invention, crown reinforcement can be further by inextensible by steel
Triangular lamella made of metal reinforcement element carcass reinforcement and closest to the carcass reinforcement inner radial working lining it
Between supplemented in radially inner side, the inextensible metal reinforcement element and circumferential direction form the angle more than 60 °, and side
It is identical to the angle with being formed by reinforcing element of the radial direction closest to the layer of carcass reinforcement.
The tire according to the present invention being described immediately above is with improved cornering stiffness property therefore with durability side
The property of the raising in face regardless of whether driving conditions how.
Brief description of the drawings
The other details and favorable characteristics of the present invention will be from the exemplary implementation of the invention below with reference to Fig. 1 and Fig. 2
Become apparent in the description of scheme, in the drawings：
Fig. 1：The schematic middle plan of tire according to the first embodiment of the present invention,
Fig. 2：The schematic middle plan of tire according to the second embodiment of the present invention,
For ease of understanding, attached drawing is not to scale.These figures merely illustrate the half of the figure of tire, tire phase
Symmetrically continue for axis X X ', plane or equatorial plane in the circumference of axis X X ' expression tires.
Embodiment
In Fig. 1, it is in tire 1 that the aspect ratio H/S that the tire 1 that size is 315/70R 22.5 has, which is equal to 0.70, H,
Tire height on wheel rim is installed, S is its maximum axial width.The tire 1 (does not show including being fixed on two tyre beads in figure
Go out) in radial carcass reinforcement 2.Carcass reinforcement is formed by single-layer metal cord.The carcass reinforcement 2 is by crown reinforcement
4 hoops, the crown reinforcement 4 are formed from radially inner side to outside by following structures：
- the first working lining 41 formed by non-encapsulated non-extensible 9.28 metal cords, the cord is in casing ply
It is continuous on whole width, and oriented with the angle equal to 24 °,
The layer 42 of the circumferential reinforcing element of-" bimodular " type, the circumferential direction reinforcing element is by 21x23 steel metal cord shapes
Into,
- the second working lining 43 formed by non-encapsulated inextensible 9.28 metal cords, the cord is in casing ply
Whole width on it is continuous, and oriented with the angle equal to 24 °, and intersect with the metal cords of layer 41,
- the protective layer 44 formed by elastic 6.35 metal cords.
Crown reinforcement is covered by tyre surface 6 in itself.
The maximum axial width of tire is equal to 317mm.
The axial width L of first working lining 4141Equal to 252mm.
The axial width L of second working lining 4343Equal to 232mm.Width L41And L43Between difference be equal to 15mm.
For the axial width L of the layer 42 of circumferential reinforcing element42, it is equal to 194mm.
It is referred to as the width L for protecting the final crown plies 44 of casing ply44Equal to 124mm.
According to the present invention, the first layer S of rubber compounding thing is arranged between 2 and first working lining 41 of carcass reinforcement.
In Fig. 2, difference lies in second layer G is diametrically in carcass reinforcement 2 and first for the tire in tire 1 and Fig. 1
Extend first layer S between working lining 41.
Various tire S1 and S2 produced by the invention are tested.The tire S2 of production, as shown in Figure 1, tire
S1 does not include the layer of circumferential reinforcing element.These tires S1 and S2 according to the present invention is compared with reference tire T1, tire
T1 does not include the layer of circumferential reinforcing element, and the first layer S of the polymer blend is returning to circulation at 10% and 60 DEG C
The plural dynamic shear modulus G of middle measurement*Less than 1.35MPa.
The various blends for first layer S are listed below.
The value of constituent is represented with phr (parts by weight/hundred part elastomer).
Reference tire T1 has the first layer S as made from blend R1.
Tire S1 and S2 according to the present invention have the first layer S as made from blend 1.
First durability test is run on a testing machine, forces each tire with equal to maximal rate as defined in the tire
With straight-line travelling under the initial load of 4000kg under the speed of grade (Rate Index), the initial load gradually increase so as to
Reduce the duration of experiment.
It was found that the tire of all tests shows substantially suitable result.
Other durability tests are carried out on a testing machine：Lateral load and dynamic overload are cyclically applied on tire.
Tire according to the present invention is being tested under the same conditions with reference tire.
The distance of each tire running is different, occurs event due to the deterioration in the rubber compounding thing of the end of working lining
Barrier.The results show in the following table, is referenced as the radix 100 with reference to tire T1 settings.
| Tire T1 | Tire S1 | Tire S2 |
| 100 | 125 | 135 |
, the results show that first layer S according to the present invention, what it was measured at 10% and 60 DEG C in circulation is returned answers for these
Number dynamic shear modulus G*More than 1.35MPa, this causes when there is circumferential reinforcing element, durability performance, particularly
It is that the cornering stiffness property of tire is significantly improved.
Claims (16)
1. the tire with radial carcass reinforcement, it includes crown reinforcement, the crown reinforcement by reinforcing element extremely
Few two work crown layer is formed, and at least two work crown layer intersects from one layer to another layer and formed with circumferential direction
Angle between 10 ° and 45 °, the first layer S of polymer blend are contacted with least one work crown layer, and are strengthened with carcass
Part contacts, and the first layer S of the polymer blend is axially extended until at least axial end portion of tyre surface, the tyre surface is radially
Crown reinforcement is covered, and tyre bead is connected to by two sidewalls, it is characterised in that the first layer S of the polymer blend
The plural dynamic shear modulus G* measured at 10% and 60 DEG C in circulation is returned is more than 1.35MPa.
2. tire according to claim 1, it is characterised in that crown reinforcement includes at least one circumferential reinforcing element
Layer.
3. tire according to claim 1 or 2, it is characterised in that first layer S is at 10% and 60 DEG C in circulation is returned
The complex shear modulus G* of measurement is less than 2Mpa.
4. tire according to claim 1 or 2, it is characterised in that first layer S's is expressed as tan (δ)maxTan (δ)
Maximum is less than 0.100.
5. tire according to claim 1 or 2, it is characterised in that the first layer S of the polymer blend is included by such as
The reinforcer of lower composition：
A) BET specific surface area is in 30 and 160m2Carbon black between/g, with equal to or more than 15phr and less than or equal to 28phr's
Content uses,
B) or BET specific surface area is in 30 and 260m2The silica comprising SiOH and/or AlOH surface functional groups between/g and/
Or the white filler of alumina type, the white filler is selected from precipitation or pyrolytic silicon dioxide, aluminium oxide, aluminosilicate, or is closing
During or the post-modification of synthesis carbon black, with more than or equal to 15phr and less than or equal to 55phr content use,
C) carbon black described in or a) and b) described in white filler blend, wherein overall filler content is greater than or equal to
15phr and it is less than or equal to 50phr, and the phr contents of white filler are greater than or equal to the phr contents that carbon black subtracts 5.
6. tire according to claim 1, the tire includes the second layer G of polymer blend, the second layer G edges
The axial first layer S contact with polymer blend, and it is radially positioned at the reinforcing element of carcass reinforcement and crown reinforcement
Radially innermost layer between, it is characterised in that the second layer G of the polymer blend at 10% and 60 DEG C return circulate
In the plural dynamic shear modulus G* that measures be more than 1.35MPa.
7. tire according to claim 6, it is characterised in that second layer G is surveyed at 10% and 60 DEG C in circulation is returned
The complex shear modulus G* of amount is less than 2Mpa.
8. according to the tire any one of claim 6 and 7, it is characterised in that second layer G's is expressed as tan (δ)max's
The maximum of tan (δ) is less than 0.100.
9. the tire according to claim 6 or 7, it is characterised in that the second layer G of the polymer blend is included by such as
Lower obtained reinforcer：
A) BET specific surface area is in 30 and 160m2Carbon black between/g, with equal to or more than 15phr and less than or equal to 28phr's
Content uses,
B) or BET specific surface area is in 30 and 260m2The silica comprising SiOH and/or AlOH surface functional groups between/g and/
Or the white filler of alumina type, the white filler is selected from precipitation or pyrolytic silicon dioxide, aluminium oxide, aluminosilicate, or is closing
During or the post-modification of synthesis carbon black, with more than or equal to 15phr and less than or equal to 55phr content use,
C) carbon black described in or a) and b) described in white filler blend, wherein overall filler content is greater than or equal to
15phr and it is less than or equal to 50phr, and the phr contents of white filler are greater than or equal to the phr contents that carbon black subtracts 5.
10. tire according to claim 2, it is characterised in that the layer of circumferential reinforcing element is arranged radially in two works
Make between crown layer.
11. the tire according to claim 10, it is characterised in that the work crown of the layer of radially adjacent circumferential direction reinforcing element
The axial width of layer is more than the axial width of the layer of the circumferential reinforcing element.
12. tire according to claim 11, it is characterised in that every side of plane and in circumferential reinforcing element under the line
Layer direct axial continuation in, the work crown layer neighbouring with the layer of circumferential reinforcing element couples on axial width,
At least departed from afterwards by forming element made of rubber compounding thing on the public remaining width of described two work crown layers
Connection.
13. tire according to claim 2, it is characterised in that the reinforcing element of the layer of at least one circumferential direction reinforcing element
For metal reinforcement element, the metal reinforcement element has the secant under 0.7% elongation being included between 10 and 120GPa
Modulus, and with the maximum tangent modulus less than 150GPa.
14. tire according to claim 1 or 2, it is characterised in that the reinforcing element for the crown layer that works is non-extensible.
15. tire according to claim 1 or 2, it is characterised in that crown reinforcement is by being referred to as the increasing of flexible member
At least one additional casing ply for being referred to as protecting casing ply of strong element is supplemented in radial outside, and the additional casing ply is opposite
In angle orientation of the circumferential direction between 10 ° and 45 °, and formed with the non-extensible element of work casing ply adjacent thereto
Angle there is identical direction.
16. tire according to claim 1 or 2, it is characterised in that crown reinforcement further comprises and circumferential direction shape
Into the triangular lamella formed by metal reinforcement element of the angle more than 60 °.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1455970 | 2014-06-26 | ||
| FR1455970A FR3022848B1 (en) | 2014-06-26 | 2014-06-26 | PNEUMATIC HAVING IMPROVED DYNAMIC PROPERTIES |
| PCT/EP2015/061721 WO2015197296A1 (en) | 2014-06-26 | 2015-05-27 | Tyre having improved dynamic properties |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106457911A CN106457911A (en) | 2017-02-22 |
| CN106457911B true CN106457911B (en) | 2018-04-17 |
Family
ID=51659809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580034650.0A Active CN106457911B (en) | 2014-06-26 | 2015-05-27 | Tire with improved dynamic property |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US10518585B2 (en) |
| EP (1) | EP3160767B1 (en) |
| JP (1) | JP2017521304A (en) |
| CN (1) | CN106457911B (en) |
| BR (1) | BR112016029532B1 (en) |
| FR (1) | FR3022848B1 (en) |
| WO (1) | WO2015197296A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3069190A1 (en) * | 2017-07-21 | 2019-01-25 | Compagnie Generale Des Etablissements Michelin | PNEUMATIC HAVING IMPROVED WEAR AND ROLL RESISTANCE PROPERTIES |
| WO2019092361A1 (en) * | 2017-11-08 | 2019-05-16 | Compagnie Generale Des Etablissements Michelin | Pneumatic tyre having a lightweight crown reinforcement |
| US11787235B2 (en) * | 2017-11-17 | 2023-10-17 | Compagnie Generale Des Etablissements Michelin | Tire comprising a carcass reinforcement layer having improved endurance properties |
| EP4140766A1 (en) * | 2021-08-24 | 2023-03-01 | Sumitomo Rubber Industries, Ltd. | Heavy duty pneumatic tire |
| EP4140767A1 (en) * | 2021-08-24 | 2023-03-01 | Sumitomo Rubber Industries, Ltd. | Heavy duty pneumatic tire |
| JP7151917B1 (en) * | 2022-02-09 | 2022-10-12 | 住友ゴム工業株式会社 | Heavy duty pneumatic tire |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0785096A1 (en) * | 1996-01-19 | 1997-07-23 | PIRELLI COORDINAMENTO PNEUMATICI S.p.A. | Radial tyre for motor-vehicles with an improved belt structure |
| CN101213086A (en) * | 2005-06-30 | 2008-07-02 | 米其林技术公司 | Tyre for heavy vehicle |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR489255A (en) * | 1961-07-06 | 1919-01-11 | Edward Bullock Webster | Mechanical device suitable for preventing the skidding of automobiles and for propelling boats, sleds, bicycles, or other vehicles, on ice or on water, as well as for other uses |
| FR1389428A (en) | 1963-07-19 | 1965-02-19 | Pneumatiques, Caoutchouc Manufacture Et Plastiques Kleber Colombes | Heavy duty vehicle tire |
| DE2313586A1 (en) | 1973-03-19 | 1974-09-26 | Uniroyal Ag | VEHICLE AIR TIRES, IN PARTICULAR FOR TRUCKS |
| US4688615A (en) * | 1985-05-28 | 1987-08-25 | The Goodyear Tire & Rubber Company | Reinforcing structure for a rubber article |
| JPH03176206A (en) * | 1989-09-07 | 1991-07-31 | Sumitomo Rubber Ind Ltd | Tire containing air |
| FR2770458B1 (en) | 1997-11-05 | 1999-12-03 | Michelin & Cie | SUMMIT FRAME FOR TIRE-HEAVY TIRE |
| WO2004076204A1 (en) | 2003-02-17 | 2004-09-10 | Societe De Technologie Michelin | Crown reinforcement for radial tyre |
| JP4102241B2 (en) * | 2003-04-10 | 2008-06-18 | 住友ゴム工業株式会社 | Rubber composition for sidewall and pneumatic tire using the same |
| FR2889195B1 (en) * | 2005-08-01 | 2007-09-28 | Michelin Soc Tech | RUBBER COMPOSITION COMPRISING BRANCHED BLOCK POLYMERS |
| EP2512824B1 (en) * | 2009-12-16 | 2015-05-27 | MICHELIN Recherche et Technique S.A. | High silica content for heavy vehicle tires |
| FR2966384A1 (en) * | 2010-10-22 | 2012-04-27 | Michelin Soc Tech | PNEUMATIC COMPRISING A BUFFER ZONE BETWEEN THE CARCASE FRAME AND THE TOP FRAME |
| CN201895537U (en) * | 2010-11-01 | 2011-07-13 | 青岛双星轮胎工业有限公司 | Loading radial tire |
| FR2967940B1 (en) * | 2010-11-25 | 2012-12-07 | Michelin Soc Tech | HEAVY WEIGHT TIRE FOR TRAILER VEHICLE |
| FR2981297B1 (en) * | 2011-10-13 | 2013-10-25 | Michelin Soc Tech | PNEUMATIC COMPRISING A LAYER OF CIRCUMFERENTIAL REINFORCING ELEMENTS |
-
2014
- 2014-06-26 FR FR1455970A patent/FR3022848B1/en not_active Expired - Fee Related
-
2015
- 2015-05-27 US US15/321,663 patent/US10518585B2/en active Active
- 2015-05-27 WO PCT/EP2015/061721 patent/WO2015197296A1/en active Application Filing
- 2015-05-27 EP EP15725611.6A patent/EP3160767B1/en active Active
- 2015-05-27 BR BR112016029532-3A patent/BR112016029532B1/en active IP Right Grant
- 2015-05-27 CN CN201580034650.0A patent/CN106457911B/en active Active
- 2015-05-27 JP JP2016575465A patent/JP2017521304A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0785096A1 (en) * | 1996-01-19 | 1997-07-23 | PIRELLI COORDINAMENTO PNEUMATICI S.p.A. | Radial tyre for motor-vehicles with an improved belt structure |
| CN101213086A (en) * | 2005-06-30 | 2008-07-02 | 米其林技术公司 | Tyre for heavy vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015197296A1 (en) | 2015-12-30 |
| EP3160767A1 (en) | 2017-05-03 |
| JP2017521304A (en) | 2017-08-03 |
| US10518585B2 (en) | 2019-12-31 |
| CN106457911A (en) | 2017-02-22 |
| BR112016029532A2 (en) | 2018-11-27 |
| BR112016029532B1 (en) | 2021-02-23 |
| US20170210172A1 (en) | 2017-07-27 |
| FR3022848B1 (en) | 2016-06-10 |
| FR3022848A1 (en) | 2016-01-01 |
| EP3160767B1 (en) | 2019-09-18 |
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Effective date of registration: 20170802 Address after: French Clermont Ferrand Applicant after: Compagnie General Des Etablissements Michelin Address before: French Clermont Ferrand Applicant before: Compagnie General Des Etablissements Michelin Applicant before: Michelin Research & Technology Co., Ltd. |
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